132 



DISCOVERY REPORTS 



from 57 to 66. The single specimen taken at Mocha Island extends the known range 

 of the species considerably further north on the Chilean coast. This specimen is much 

 darker than most of the others, the coloration being blackish with numerous small, 

 scattered, pale spots. In the young of this species the head and body are covered with 

 a large number of small dark brown spots. 



Fig. 74. Thysanopsetta naresi. 



Hippoglossina macrops, Steindachner. 



1876, SitzBer. Akad. Wiss. Wien, lxxiv (1), p. 13, pi. iii; Abbott, 1899, Proc. Acad. N.S. 



Philad., p. 475. 

 ? Hippoglossina macrops (part), Lonnberg, 1907, Hamb. Magalh. Sammelr., Fische, p. 14. 



St. WS 742. 5. ix. 31. 38 22' S, 73 41' W. Small beam trawl, 35 m.: 1 specimen, 123 mm. 



Depth of body 2§ in the length, length of head about 3. Snout shorter than eye, 

 diameter of which is about 4 in length of head. Maxillary extending to below middle 

 of eye. 12 gill-rakers on lower part of anterior arch. About 78 scales in the lateral line; 

 scales on blind side ctenoid only on the posterior part of the body. Dorsal (66-67) 69 ; 

 anal (52) 56. Pectoral of ocular side with 12 rays, length about i that of head. Caudal 

 rounded ; caudal peduncle a little deeper than long. 



Hob. Coast of Chile. 



Hippoglossina mystacium, Ginsburg. 



Hippoglossina macrops (non Steindachner), Gtinther, 1881, Proc. Zool. Soc, p. 21; Thompson, 

 1916, Proc. U.S. Nat. Mus., L, p. 424; Norman, 1934, Syst. Monogr. Flatfishes, 1, p. 67, 



%• 35- 

 ? Hippoglossina macrops (part), Lonnberg, 1907, Hamb. Magalh. Sammelr., Fische, p. 14. 



Hippoglossina mystacium, Ginsburg, 1936, J. Wash. Acad. Sci., XXVI, p. 130, fig. 1. 



Hob. Straits of Magellan; southern Chile. 



This species is very closely related to H. macrops, but, as Ginsburg has pointed out, 

 it has a somewhat more slender body, a smaller head, and the ctenoid scales on the 

 blind side of the body appear to extend further forward. The type is 183 mm. in total 

 length (U.S.N.M. No. 77393), from near the Taitao Peninsula, southern Chile 

 ('Albatross' St. 2787), and, although Ginsburg makes no mention of this fact, this is 

 clearly the specimen examined by Thompson. No examples of this species were 

 obtained by the Discovery Expedition, but re-examination of the 2 specimens (132, 

 205 mm.) from Trinidad Channel, Magellan Strait, previously identified by me as 



